077
FNCA52 TJSJ 120830
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
430 AM AST SUN JUL 12 2026
DISCUSSION
DESPITE DRIER AIRMASS IS DOMINATING THE LOCAL REGION NOW, AN
INCREASE IN MOISTURE IS EXPECTED AS THE DAY PROGRESSES INCREASING
THE RH VALUES STAYING IN THE LOW TO MID 50S ACROSS THE SOUTHERN
COASTAL AREAS. WINDS WILL REMAIN FROM THE E-NE, BECOMING FROM THE
E AT 10 AM UP TO 15 MPH AND SLIGHTLY HIGHER ACROSS COASTAL AREAS.
THE INCREASE IN MOISTURE WILL ENHANCE SHOWER ACTIVITY FOR THE
WESTERN INTERIOR SECTIONS BY THIS AFTERNOON. THEREFORE, AN FIRE DANGER
STATEMENT WAS ISSUED FOR SOME AREAS ACROSS PUERTO RICO DUE TO RH
VALUES NEAR THE THRESHOLDS IN THE MORNING AND EARLY AFTERNOON
HOURS.
PRZ014-122115-
SOUTHEAST COASTAL PLAINS-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10
TEMP (24H TREND) 94 (+2) 75 (-1) 93
RH % (24H TREND) 42 (-4) 86 (+10) 45
WIND 20FT/EARLY(MPH) E 17 NE 16 E 17
WIND 20FT/LATE(MPH) E 19 NE 10 E 18
MIXING HGT(FT-AGL/MSL)5780 5430
TRANSPORT WND (MPH) E 20 E 18
VENT RATE (KT-FT) 98260 86880
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-122115-
SOUTHERN HILLS-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 10
TEMP (24H TREND) 90 (+3) 71 (-2) 89
RH % (24H TREND) 54 (-4) 97 (+8) 58
WIND 20FT/EARLY(MPH) E 13 NE 12 E 13
WIND 20FT/LATE(MPH) E 14 NE 11 E 13
MIXING HGT(FT-AGL/MSL)5950 5680
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 89250 79520
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-122115-
NORTH COASTAL PLAINS-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 90 (+1) 75 (-1) 90
RH % (24H TREND) 59 (-5) 96 (+6) 61
WIND 20FT/EARLY(MPH) E 17 E 19 E 16
WIND 20FT/LATE(MPH) E 21 E 12 E 21
MIXING HGT(FT-AGL/MSL)5550 5490
TRANSPORT WND (MPH) E 21 E 18
VENT RATE (KT-FT) 99900 87840
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-122115-
NORTHERN HILLS-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 0 50
TEMP (24H TREND) 89 (+1) 72 (-2) 89
RH % (24H TREND) 60 (-1) 97 (+4) 64
WIND 20FT/EARLY(MPH) E 16 E 17 E 14
WIND 20FT/LATE(MPH) NE 19 E 11 E 18
MIXING HGT(FT-AGL/MSL)6050 6180
TRANSPORT WND (MPH) E 17 E 14
VENT RATE (KT-FT) 90750 74160
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-122115-
WEST COAST-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 10 60
TEMP (24H TREND) 93 (0) 74 (0) 93
RH % (24H TREND) 55 (-4) 95 (+5) 60
WIND 20FT/EARLY(MPH) E 14 NE 18 E 13
WIND 20FT/LATE(MPH) E 16 E 13 E 14
MIXING HGT(FT-AGL/MSL)5620 4960
TRANSPORT WND (MPH) E 13 E 10
VENT RATE (KT-FT) 61820 44640
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-122115-
EASTERN INTERIOR-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 20
TEMP (24H TREND) 89 (+2) 72 (-3) 90
RH % (24H TREND) 59 (-3) 98 (+7) 61
WIND 20FT/EARLY(MPH) E 13 E 12 E 14
WIND 20FT/LATE(MPH) E 13 E 12 E 14
MIXING HGT(FT-AGL/MSL)6200 6330
TRANSPORT WND (MPH) E 17 E 17
VENT RATE (KT-FT) 93000 94950
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-122115-
LUQUILLO MOUNTAIN RANGE-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 20
TEMP (24H TREND) 85 (+4) 70 (-3) 85
RH % (24H TREND) 67 (-6) 100 (+6) 69
WIND 20FT/EARLY(MPH) E 12 E 11 E 13
WIND 20FT/LATE(MPH) E 12 E 10 E 13
MIXING HGT(FT-AGL/MSL)5360 4940
TRANSPORT WND (MPH) E 20 E 20
VENT RATE (KT-FT) 91120 83980
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-122115-
CENTRAL MOUNTAIN RANGE-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 0 40
TEMP (24H TREND) 88 (+3) 68 (-3) 88
RH % (24H TREND) 61 (-2) 98 (+5) 65
WIND 20FT/EARLY(MPH) E 10 NE 12 E 10
WIND 20FT/LATE(MPH) E 13 E 10 E 11
MIXING HGT(FT-AGL/MSL)7360 6700
TRANSPORT WND (MPH) E 13 E 12
VENT RATE (KT-FT) 80960 67000
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-122115-
CAYEY MOUNTAIN RANGE-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20
TEMP (24H TREND) 85 (+2) 71 (-1) 85
RH % (24H TREND) 65 (-1) 100 (+4) 68
WIND 20FT/EARLY(MPH) E 13 NE 11 E 12
WIND 20FT/LATE(MPH) E 13 E 9 E 12
MIXING HGT(FT-AGL/MSL)5660 5610
TRANSPORT WND (MPH) E 18 E 18
VENT RATE (KT-FT) 90560 89760
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-122115-
VIEQUES-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 10
TEMP (24H TREND) 89 (+1) 77 (-2) 89
RH % (24H TREND) 59 (-3) 89 (+5) 59
WIND 20FT/EARLY(MPH) E 17 E 16 E 17
WIND 20FT/LATE(MPH) E 14 E 16 E 16
MIXING HGT(FT-AGL/MSL)4690 3430
TRANSPORT WND (MPH) E 24 E 20
VENT RATE (KT-FT) 98490 58310
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-122115-
CULEBRA-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 10
TEMP (24H TREND) 91 (+3) 78 (-2) 91
RH % (24H TREND) 59 (-6) 91 (+7) 60
WIND 20FT/EARLY(MPH) E 16 E 14 E 17
WIND 20FT/LATE(MPH) E 16 E 16 E 16
MIXING HGT(FT-AGL/MSL)4540 3470
TRANSPORT WND (MPH) E 23 E 20
VENT RATE (KT-FT) 90800 58990
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-122115-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 94 (+2) 75 (-1) 93
RH % (24H TREND) 42 (-7) 84 (+8) 48
WIND 20FT/EARLY(MPH) E 18 E 14 E 19
WIND 20FT/LATE(MPH) E 23 E 10 SE 20
MIXING HGT(FT-AGL/MSL)5570 5200
TRANSPORT WND (MPH) E 20 E 20
VENT RATE (KT-FT) 94690 88400
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-122115-
SAINT THOMAS AND SAINT JOHN-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 20 40 0
TEMP (24H TREND) 88 (+2) 77 (-2) 88
RH % (24H TREND) 63 (-4) 93 (+9) 64
WIND 20FT/EARLY(MPH) E 16 E 16 E 17
WIND 20FT/LATE(MPH) E 16 E 17 E 16
MIXING HGT(FT-AGL/MSL)3910 3360
TRANSPORT WND (MPH) E 24 E 20
VENT RATE (KT-FT) 82110 57120
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-122115-
ST CROIX-
430 AM AST SUN JUL 12 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 30 30 0
TEMP (24H TREND) 89 (+2) 77 (-2) 89
RH % (24H TREND) 63 (-3) 91 (+5) 63
WIND 20FT/EARLY(MPH) E 17 E 14 E 17
WIND 20FT/LATE(MPH) E 16 E 17 E 14
MIXING HGT(FT-AGL/MSL)5280 4710
TRANSPORT WND (MPH) E 21 E 21
VENT RATE (KT-FT) 95040 84780
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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